def findPointOnCurve(point, handleCurve, tolerance):
"return the closest parameter on the curve for the provided point"
"returns none if a point is not within tolerance"
gp = GeomAPI.GeomAPI_ProjectPointOnCurve(point, handleCurve)
gp.Perform(point)
if gp.NbPoints() > 0 and gp.LowerDistance() <= tolerance:
#log.debug( "Projection Success!" );
return [gp.LowerDistanceParameter(),
gp.NearestPoint()]
else:
#log.warn( "Projection Failed.");
return None
def findPointOnCurve(point, handleCurve, tolerance, umin=None, umax=None):
"return the closest parameter on the curve for the provided point"
"returns none if a point is not within tolerance"
if umin is None:
gp = GeomAPI.GeomAPI_ProjectPointOnCurve(point, handleCurve)
else:
gp = GeomAPI.GeomAPI_ProjectPointOnCurve(point, handleCurve, umin,
umax)
gp.Perform(point)
#print "tolerance = %0.3f, nbpoints=%d" % ( tolerance , gp.NbPoints() )
if gp.NbPoints() > 0 and gp.LowerDistance() <= tolerance:
#log.debug( "Projection Success!" );
return [gp.LowerDistanceParameter(),
gp.NearestPoint()]
else:
raise Exception("Projection Failed, try larger Tolerance!")
def findParameterOnCurve(point, handleCurve, tolerance):
"return the closest parameter on the curve for the provided point"
"returns none if a point is not within tolerance"
#TODO: Extrema.Extrema_ExtPC will project a point onto an Adaptor_3d Curve
#so we do not have to approximate with a bspline
#BrepAdaptor.BrepAdaptor_CompCurve.Trim() will return a trimmed curve between two parameters
#E1CLib can project points on elementary curves (lines and conics )
gp = GeomAPI.GeomAPI_ProjectPointOnCurve(point, handleCurve)
gp.Perform(point)
if gp.NbPoints() > 0:
#log.debug( "Projection Success!" );
return [point, gp.LowerDistanceParameter(),
gp.LowerDistance()]
else:
#log.error( "Projection Failed.");
return None
def projectPointOnCurve2d(handleCurve, point, tolerance):
"return the closest parameter on the curve for the provided point"
"returns none if a point is not within tolerance"
#get start and end params of curve
curve = handleCurve.GetObject()
gp = Geom2dAPI.Geom2dAPI_ProjectPointOnCurve(point, handleCurve,
curve.FirstParameter(),
curve.LastParameter())
if gp.NbPoints() > 0 and gp.LowerDistance() <= tolerance:
#log.debug( "Projection Success!" );
#print "project success."
return (gp.LowerDistanceParameter(), gp.NearestPoint())
else:
print("Projection Failed.")
return None